MT90869AG Zarlink, MT90869AG Datasheet - Page 17

• Manufacturer Part Number: MT90869AG
• Description: Switch Fabric 16K x 16K/8K x 8K 1.8V/3.3V 272-Pin BGA Tray
• Manufacturer: Zarlink

Specifications of MT90869AG

• Package: 272BGA
• Number Of Ports: 64
• Fabric Size: 16K x 16K|8K x 8K
• Switch Core: Non-Blocking|Blocking
• Port Speed: 8.192|4.096|2.048 Mbps
• Operating Supply Voltage: 1.8|3.3 V

1.0
The MT90869 has a maximum capacity of 16,384 input channels and 16,384 output channels. This is calculated
from the maximum number of streams and channels: 64 input streams (32 backplane, 32 local) at 16.384 Mb/s and
64 output streams (32 backplane, 32 local) at 16.384 Mb/s.
One typical mode of operation is to separate the Backplane and Local sides, as shown in Figure 3 below.
In this system setup, the chip has a capacity of 8,192 input channels and 8,192 output channels on the Backplane
side as well as 8,192 input channels and 8,192 output channels on the Local side. Note that some or all of the
output channels on one side can come from the other side, i.e., Backplane input to Local output switching.
Often a system design does not need to differentiate between a Backplane and Local side, and merely needs
maximum switching capacity. In this case, the MT90869 can be used as shown in Figure 4 to give the full 16,384 x
16,384 channel capacity.
Bidirectional and Unidirectional Switching Applications
BACKPLANE
INPUT
Figure 4 - 16,384 x 16,384 Channels (16 Mb/s), Unidirectional Switching
Figure 3 - 8,192 x 8,192 Channels (16 Mb/s), Bidirectional Switching
32 streams
32 streams
BSTi0-31
BSTo0-31
32 streams
32 streams
BSTi0-31
LSTi0-31
Zarlink Semiconductor Inc.
MT90869
MT90869
MT90869
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32 streams
32 streams
LSTo0-31
LSTi0-31
32 streams
32 streams
BSTo0-31
LSTo0-31
OUTPUT
LOCAL
Data Sheet